| Title | Optimal control over high-order-harmonic ellipticity in two-color cross-linearly-polarized laser fields |
| Authors | Fang, Yiqi Liu, Yunquan |
| Affiliation | Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China Peking Univ, Sch Phys, Frontiers Sci Ctr Nanooptoelect, Beijing 100871, Peoples R China Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China Peking Univ, Ctr Appl Phys & Technol, HEDPS, Beijing 100871, Peoples R China |
| Keywords | ANGULAR-MOMENTUM GENERATION PATH |
| Issue Date | 24-Mar-2021 |
| Publisher | PHYSICAL REVIEW A |
| Abstract | We investigate the generation of high-order harmonics with arbitrary ellipticity using synthesized two-color (800-nm + 400-nm) cross-linearly-polarized laser fields. It is shown that one can realize control over harmonic ellipticity by finely adjusting the relative phase and the crossing angle of such two-color fields. Through analyzing the time-frequency distributions and the quantum orbits of harmonic radiations, we show that the harmonic helicity is originated from the unsymmetrical contribution between different quantum orbits released in one 800-nm cycle. And, we further reveal that the controllability of harmonic ellipticity in such two-color fields is closely related to the modulation of crossing angle and relative phase on the driving light's spin angular momentum. Finally, we show the probability of producing and modulating isolated helical attosecond pulses with few-cycle two-color cross-linearly-polarized laser fields. |
| URI | http://hdl.handle.net/20.500.11897/613862 |
| ISSN | 2469-9926 |
| DOI | 10.1103/PhysRevA.103.033116 |
| Indexed | EI SCI(E) |
| Appears in Collections: | 物理学院 人工微结构和介观物理国家重点实验室 工学院 |
